Debian's which hunt

To be clear:

- You should use "which" if you're still stuck with a C-shell for some reason
$ tcsh
> which which
which: shell built-in command.

More C-shell history below

- I'm not saying "which" must be removed or deprecated or whatever (I don't care). But I am saying it is harmful for bash and other Bourne shell users and that they should stop using it for their own good.